Four-wheeled motorcycle



FIG. 1 is a front perspective view of a four-wheeled motorcycle showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a left side perspective view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is an oblique perspective view thereof. 

The ornamental design for a four-wheeled motorcycle, as shown. 